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2003 Pontiac Montana w/1SA Pkg 4dr Reg WB

2003 Pontiac Montana
Trim Info:
Front Wheel Drive, 4 Door Reg WB, 2WD Minivan
19 mpg city / 26 mpg hwy
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January 11, 2011, 9:22 am

Muriel H

Question: why has my temperature gauge suddenly stopped working

I submitted this before but got no reply. I hope you can help me. The gauge just stopped registering one day when I was driving and now when I start up the van it stays at 160. My concern is that if I drive the van for several miles it will overheat and I will not know. Is the gauge governed by a sensor or thermometer? should I be concerned while drive the van when the gauge is not working.

January 13, 2011, 10:48 am

Elizabeth K

Check that you have coolant--if it gets too low, the sensor will not work at all.

If the coolant is full, then the problem is either in the sending unit, dash gauge or the wiring/connections in between. Here's an article with some information on how to test the system:

If you have coolant in the systems and have not been having overheating problems, it is a safe bet to drive the vehicle for a while before getting it fixed. If you are low on coolant or have been having problems lately, then you are at risk of overheating and doing some engine damage--this is a situation that needs to be dealt with immediately.

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